y=(x-1)(x-2)…(x-10).(x>10)的导数!
需要详细过程!谢谢!
y=(x-1)(x-2)…(x-10).(x>10)的导数!
需要详细过程!谢谢!
第一步:两边取对数,lny=ln(x-1)+ln(x-2)+....+ln(x-10)
第二步:求导y'/y=1/(x-1)+1/(x-2)+...+1/(x-10)
y'=y*﹝1/(x-1)+1/(x-2)+...+1/(x-10)﹞=﹝x-1)(x-2)…(x-10)﹞﹝1/(x-1)+1/(x-2)+...+1/(x-10)﹞
y=(x^2-3x+2)'(x^2-7x...)'....(x^2-19x)'=(2x-3)(2x-7)(2x-11)(2x-15)(2x-19)=...........